[valiant4thetruth]

A man may hate cruelty and yet love justice, may be far from thirsting after blood and yet may wash his feet in the blood of the wicked, Ps 58:10. (from Matthew Henry's Commentary on the Whole Bible: New Modern Edition, Electronic Database. Copyright (c) 1991 by Hendrickson Publishers, Inc.)

[.30Carbine]

A man may hate cruelty and yet love justice,
may be far from thirsting after blood and yet may wash his feet in the blood of the wicked.
~ Ps 58:10

[NickDixon]

A man may hate cruelty and yet love justice, may be far from thirsting after blood and yet may wash his feet in the blood of the wicked, Ps 58:10

I specifically said that you cannot use the New Testament to justify vengeance and violence. The scripture you quote is from the Old Testament, which is very different from what Jesus and the New Testament teaches.